Ouimette has been heard in such animated series as Sailor Moon, Police Academy, ALFTales and X-Men. His most notable voice role has been the title character on the Beetlejuice cartoon spin-off, and he also played the character Pompadour on Nelvana's Babar series and film. On-camera, Ouimette starred as ghostly Shakespearean director Oliver Welles on the series Slings and Arrows.